42161144 has 8 divisors (see below), whose sum is σ = 79052160. Its totient is φ = 21080568.

The previous prime is 42161143. The next prime is 42161153. The reversal of 42161144 is 44116124.

It is a happy number.

42161144 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42161143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2635064 + ... + 2635079.

It is an arithmetic number, because the mean of its divisors is an integer number (9881520).

Almost surely, 2^42161144 is an apocalyptic number.

It is an amenable number.

42161144 is a deficient number, since it is larger than the sum of its proper divisors (36891016).

42161144 is a wasteful number, since it uses less digits than its factorization.

42161144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5270149 (or 5270145 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 42161144 is about 6493.1613255794. The cubic root of 42161144 is about 348.0466533657.

Adding to 42161144 its reverse (44116124), we get a palindrome (86277268).

The spelling of 42161144 in words is "forty-two million, one hundred sixty-one thousand, one hundred forty-four".